- Course Number:
- OMT 207
- Course Title:
- Diagnostic Procedures II
- Credit Hours:
- Lecture Hours:
- Lecture/Lab Hours:
- Lab Hours:
- Special Fee:
Course DescriptionPresents principles of advanced visual field examination with emphasis on Goldmann Perimetry. Covers principles and techniques of exophthalmometry, color and function tests, ocular motility and echography. Emphases skill development.
Intended Outcomes for the course
Upon successful completion students should be able to:
1. Accurately advanced manual perimetry perform in the clinical setting.
2. Perform basic evaluation of contact lens fit, patient education regarding insertion, removal, care and handling of contact lens in the clinical setting.
3. Acurately measure axial length of the eye and calculate intraocular lenses power in preparation for surgery.
4. Perform a variety of ancillary diagnostic tests in the clinical setting including color vision and tear function tests.
Outcome Assessment Strategies
At the beginning of the course, the instructor will detail the methods used to evaluate student progress and the criteria for assigning a course grade. The methods may include one or more of the following tools: examinations, quizzes, homework assignments, research papers, laboratory modules and student participation.
Course Content (Themes, Concepts, Issues and Skills)
ADVANCED VISUAL FIELDS
- Name and describe the anatomical structures of the visual pathway.
- Define coordinates of the visual field, including radial meridians and circles of eccentricity.
- Discuss the island of vision analogy.
- Define footcandle.
- Define visual field terminology including: isopters, threshold, suprathreshold, apostilb, decibel.
- Define depression, general defect, and focal defect of the visual field.
- Define quadrant, sector, hemi, altitudinal, bitemporal, nasal step, homonymous, congruous, incongruous, ipsilateral, and contralateral as they apply to depressions of the visual field.
- Define scotoma and list the 5 criteria for exploring scotoma of the visual field.
- Define central, pericentral, paracentral, cecal, centro-cecal as they apply to scotomas of the visual field.
- List the sequence of the visual pathway from the retina to the visual cortex in correct order.
- Relate visual field loss to specific ocular dysfunction/pathology.
- Perform a Goldmann visual field examination with emphasis on correct procedure for selecting stimulus and correcting lens power, plotting isopters, finding defects and investigating visual field loss.
- Calibrate the Goldmann perimeter.
- Describe common visual field artifacts and their causes.
- List common visual field defects from: retinal disease, optic nerve disease/glaucoma and neurological disease.
EXOPHTHALMOMETRY, COLOR VISION, TEAR FUNCTION
- Perform measurement of proptosis using a Hertel exophthalmometer.
- Demonstrate color vision testing using Ishihara test plates.
- Demonstrate color vision testing using the D-15 test.
- Name alternate methods of color testing.
- Take a history relevant to identifying a possible "dry eye" patient.
- List the steps to perform Schirmer Tear Test I and II.
- Rose Bengal.
- Define and demonstrate a tear film "breakup time" test.
- Corneal sensitivity testing.
- A. Demonstrate motility screening tests including cover/uncover, alternate cover tests.
- B. Demonstrate phoria and tropia.
- C. Demonstrate Krimsky and Hirschberg estimation.
- D. Demonstrate use of Maddox rod, Worth 4-dot, red glass, duction and version testing.
- E. Demonstrate near point of convergence/accommodation.
- F. Demonstrate vergence amplitudes.
- G. Demonstrate use of the Risley rotary prism.
- A. Measurements
- B. Patient Instruction
- C. Patient Counsel
- D. Fitting
- E. Corneal topography
- F. Corneal sensitivity testing
- List classifications of ultrasound
- Explain terminology related to ultrasound
- Describe clinical applications of diagnostic ultrasound
- Demonstrate proper maintenance of ultrasound equipment
- Define corneal thickness and list the steps necessary to perform corneal pachymetry
- Define standardized echography
- Calculate an accurate IOL lens power
- Demonstrate proper labeling of echograms
- State the effect of corneal power, lens power and overall length of the eye on IOL calculations
- Distinguish contact A-scan from Immersion A-scan
- List methods of performing diagnostic B-scans
- List methods available to document ultrasound images
- List steps necessary for performing Laser Interferometry (IOL Master)
- Define and describe wavefront diagnostics